Ideas Aren't Your Work, They're Catalysts
The word idea is a loaded word. Having ideas is treated as a reflection of genius.
You have so many great ideas. These sound wonderful. You're so brilliant for having these ideas. I couldn't think of it, but you could, which means you have something.
So, there are all these expectations tied in with ideas.
You have an idea? Wonderful.
How do you turn this idea into a finished work?
Just start working on the idea and carry it through completion? What if you can't do it justice? What if your abilities don't align with what this idea needs? What if you love this idea but you'll hate the finished work? What if the idea is brilliant, and you fuck it up executing it? And what would that say about you? Ideas, on their own, exist as Platonic ideals. But the work wouldn't. The finished work would be the finished work, out in the world, imperfect because not everybody will have the same opinion about it. It's out there, free to be judged, to be considered, and be considered brilliant or the worst trash made in that medium (I'm thinking of one recent movie in particular).
See? Expectations.
Because you're thinking of your ideas as what the finished work will be. But your ideas aren't your finished work. They're catalysts for the finished work, which most likely will end up in a completely different place than what the idea was, because through the process of creating it, you also iterate, and explore, and let it become what it wants to be.
Anyone can have an idea. But you have to be willing to let it be a catalyst and go through the process of letting the idea be the spark and then having enough distance and enough trust in the process and your ability to go through the process with the skills you have, or perhaps don't but will learn through the process of making it, until you create your finished work.
That's what ideas are supposed to be. They're not supposed to hold you back. Don't let what the word idea means to the world or what you think it means to the world, rather, hold you back from creating. Think of the word idea, and think catalyst. Catalysts are just ingredients towards something different, better, finished. You're supposed to use up the catalyst, not just let it sit there on the shelf as a decoration. It might make for an interesting statement piece, but that's not what it's there for. It's there to be turned, to be acted upon, and changed into your finished work.
And what is that finished work? You'll only find out if pick up the catalyst in your hands, and be willing to let it be destroyed. That's also what kill your darlings writing advice is about, in a way. You adore your idea, but you have to let it martyr itself on the altar of your finished work. Which - let's be honest - might still turn out to be terrible. But you've let it have the opportunity to become something that can at least be judged. Because now you made something. And then, you do it all over again.
Ideas aren't the thing. They're the thing that gets you to the thing.